Ejemplo n.º 1
0
 /**
  * Caches and returns all unique tokens specified in a query.
  *
  * @param list token list
  * @return token set
  */
 private TokenSet unique(final TokenList list) {
   // cache all query tokens in a set (duplicates are removed)
   final TokenSet ts = new TokenSet();
   switch (mode) {
     case ALL:
     case ANY:
       for (final byte[] t : list) ts.add(t);
       break;
     case ALL_WORDS:
     case ANY_WORD:
       final FTLexer l = new FTLexer(ftt.opt);
       for (final byte[] t : list) {
         l.init(t);
         while (l.hasNext()) ts.add(l.nextToken());
       }
       break;
     case PHRASE:
       final TokenBuilder tb = new TokenBuilder();
       for (final byte[] t : list) tb.add(t).add(' ');
       ts.add(tb.trim().finish());
   }
   return ts;
 }